Edwaed collins



(No Model.)

E. COLLINS.

SCROLL SAWING MACHINE.

Patented Apr. 20;

UNITED I ST TES PATENT Di ries.

EDWVARD COLLINS, OF NEIV YORK, ASSIGNOR OF OXEHALF TO JAMES K. FROTHINGHAM, OF BROOKLYN, N. Y.

SCROLL-SAWING MACHINE.

ifiiCiF-ICATION forming part of Letters Patent No. 340.097, dated April 20, 1886. Application filed June 1, IP85. Serial Xo. 167,351. (No model.)

To aZl whom, it may concern.-

Be it known that I, EDWARD COLLINS, a citizen of the United States, and a resident of New York city, county, and State of New York, have invented a new and useful Improvement in Scroll Sawing Machines, of which the following is a specification.

The object of my invention is to produce a scroll-sawing machine which is so constructed to that lightness, cheapness, durability, and effectiveness are attained.

Referring to the drawings, Figure I is a side elevation of my improved machine shown in section. Fig. II is a plan view of the same.

1 Fig. III is an end view of same. Fig. IV is a detached sectional viewof one ofthesawarms, showing it when made of cast metal. Fig. V is a front view showing a modified mode of strengthening the saw-arms.

A represents a vertical post, made of wood or iron. Onto thispost is fastened ata the two metallic guide-brackets B B, which are provided with holes (Z (I, through which slide the guide-rods C C. These bracketsv are fastened to the post by screws e e. The rods 0 C can be made hollow or solid and of metal or wood. The holes d d can be faced with any anti-friction metal,to lessen thefriction created by the movement of the rods through the said holes.

0 To these rods 0 C are fastened two saw-arms, F F, and they are placed at any convenient po sition and distance on said rods that use may suggest. These arms F F can be made of cast metal, as shown in Fig. IV; but for lightness I construct them of two strips of wood, E E, held together by stay-bolts. \Vhere the rods 0 0 pass through the strips E E, I insert sleeves, G G, which are held fast tothe strips in any convenient manner. Through these 0 sleeves the rods pass, and also through these sleeves are the arms F F, fastened to the rods, to be hereinafter more fully described. \Vhere the saw H is attached to strips E E of the arms F F, I also place sleeves I I, through which pass the hooks a", and to which the saw is attached. By constructing the arms F Fin this manner lightness and strength are attained. The arms F F are fastened to rods 0 O by bolts H H, which pass through the sleeves G G and said rods. The bolts h h are made to extend rearward and are connected to sliding bolts it, which are constructed to slide in the guideways is is, fastened onto the post A.

L is a stay-rod,fastened to the slidingblocks i z and to the arms F F at f This stay-rod is strengthened in the center by rod 0. The object of this construction is to strengthen the arms F F and to shift the strain from the same onto the post A.

In case the arms F F are made very long they may be strengthened by means of a rod, W, fastened to the extreme outer ends of the said arms, and connected by sliding blocks 20, sliding in guideways w, fastened to a post, 20', extending from the door and to a bracket, w 6 extending from the ceiling. (See Fig. 5.)

M is a table pivoted to bracket-arms N by pivotpin n, said bracket-arms being cast or otherwise fastened to the post A. These bracket-arms are made of iron and joined together at oil- ,3 ust underneath the table, by crosspieces m. The table can be tilted 011 any angle by the screw-bolt n, which is attached to the auxiliary bracket V, cast onto the bracketarms N. To furthersupport thetable,I employ the leg 0, which is pivoted to the pivot-pinn.

The saw H is fastened to the arms F F by aid of the screw bolts (0*, which, as before stated, pass through the sleeves I I. These screw-bolts are provided with thumb-screwss s, by which the saw H can be tightened as use may require.

P is an opening through the table, through which the saw passes.

R is an air-cushion to be used to take up the fall ofthe saw and all the movable parts. It consists of a cylinder, r, which is fastened to the post A by screws. Into this cylinder is placed the plunger 1", which is attached to one of the rods 0. The bottom of this cylinder 1" 0 is provided with a valve, 1, having stem '1. Now, when the rods 0 rise, they carry with them the plunger 1, which movement draws air into the cylinder 1'. \rVhen the rods 0 come down, the plunger compresses the air in the 5 cylinder, and prevents the downward movement being too rapid. This being attained, the movement of the saw either upward or downward will be the same and uniform. The saw is moved up and down by the connecting- I00 rod S, which is connected to one of the arms F in anv suitable:manner;-and.. to 1 the crank wheel T.

Having thus described my invention, I 'desire to claim- 1. In a scroll-sawing machine, the movable rods or tubes 0 O, fastened to the saw-armsF F, and sliding in guide-brackets B B, secured to the post A and operated by crank-rods, substantially as and for the purpose set forth.

2. In a scroll-sawing machine, the saw-arms- F F, constructed as described, in combination with the movable tubes or rods 0 0, held to the post A by brackets B B, and operated and held in position by crank S, substantially as and for the purpose set forth.

3. In a scroll-sawing machine, the combina- A, substantiallytas and for the purpose set tion of the rods or tubes C C, having gfaatened thereto the arms FF, the'guid'e bracketsB B, secured to post A, the crank-rod S, the crank '1, placed at the upper end of the machine, the aircushion R, placed at the bottom and underneath the tubes 0 O, the tilting table M, attached to bracket N, and the bracket L, attached to post' 25 forth.

In testimony that I claim the foregoing as my invention I have'signed my name,in pres ence of two witnesses, this 16th day of August, 1884. I 15 EDWARD COLLINS.

Witnesses:

HERBERT EDWARDS, J OHN E. BRODSKY. 

